Parallel Operation of Battery Power Modules

Operating batteries in parallel is attempted to overcome the problems with the conventionally used battery bank in which the batteries are operated in series. With parallel operation, a more reasonable management can be made to prevent the batteries from being over-charged or over-discharged. The discharging currents of the parallel batteries are independently controlled but are coordinated to execute a full amount of the load current. Some of the batteries may take rest or be isolated from the system for the detections at a time. This facilitates the estimations of the state of charge (SOC) and the state of health (SOH). In addition, sophisticated discharging profiles can be realized to efficiently utilize the available stored energy in batteries.